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Hydrogen cyanide

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Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

CN- + Hydrogen cyanide = (CN- bullet Hydrogen cyanide)

By formula: CN- + CHN = (CN- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar21.7 ± 3.5kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Deltar20.0 ± 2.0kcal/molEstLarson and McMahon, 1984gas phase; B
Deltar20.7kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar20.7kcal/molPHPMSMeot-ner, 1988gas phase; M,B,B,M
Quantity Value Units Method Reference Comment
Deltar20.6cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar20.6cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Deltar20.6cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Deltar26.9cal/mol*KN/ALarson and McMahon, 1987gas phase; switching reaction,Thermochemical ladder(H2O), Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Deltar14.5 ± 1.0kcal/molTDAsMeot-ner, 1988gas phase; B
Deltar13.7 ± 2.3kcal/molIMRELarson and McMahon, 1987gas phase; B,M
Deltar14.5 ± 1.6kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

Fluorine anion + Hydrogen cyanide = (Fluorine anion bullet Hydrogen cyanide)

By formula: F- + CHN = (F- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar39.5 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity Value Units Method Reference Comment
Deltar22.2cal/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Deltar32.9 ± 2.0kcal/molIMRELarson and McMahon, 1983gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

Lithium ion (1+) + Hydrogen cyanide = (Lithium ion (1+) bullet Hydrogen cyanide)

By formula: Li+ + CHN = (Li+ bullet CHN)

Quantity Value Units Method Reference Comment
Deltar36.4kcal/molICRWoodin and Beauchamp, 1978gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M
Deltar36.kcal/molICRStaley and Beauchamp, 1975gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 extrapolated; M
Quantity Value Units Method Reference Comment
Deltar25.cal/mol*KN/AWoodin and Beauchamp, 1978gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M
Quantity Value Units Method Reference Comment
Deltar28.kcal/molICRWoodin and Beauchamp, 1978gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M

Chlorine anion + Hydrogen cyanide = (Chlorine anion bullet Hydrogen cyanide)

By formula: Cl- + CHN = (Cl- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar21.8 ± 1.0kcal/molTDAsMeot-ner, 1988gas phase; B,B,M
Deltar21.0 ± 2.0kcal/molIMRELarson and McMahon, 1984, 2gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar18.9cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Deltar23.7cal/mol*KN/ALarson and McMahon, 1984, 3gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Quantity Value Units Method Reference Comment
Deltar16.2 ± 1.6kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B
Deltar16.1 ± 1.0kcal/molTDAsMeot-ner, 1988gas phase; B
Deltar13.9 ± 2.0kcal/molIMRELarson and McMahon, 1984, 2gas phase; B,M

CN- + Hydrogen cation = Hydrogen cyanide

By formula: CN- + H+ = CHN

Quantity Value Units Method Reference Comment
Deltar349.8 ± 1.0kcal/molCIDTAkin and Ervin, 2006gas phase; B
Deltar350.50 ± 0.17kcal/molD-EABradforth, Kim, et al., 1993gas phase; B
Deltar351.1 ± 2.1kcal/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar342.5 ± 1.1kcal/molH-TSAkin and Ervin, 2006gas phase; B
Deltar343.17 ± 0.27kcal/molH-TSBradforth, Kim, et al., 1993gas phase; B
Deltar343.8 ± 2.0kcal/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B

HCO2 anion + Hydrogen cyanide = (HCO2 anion bullet Hydrogen cyanide)

By formula: CHO2- + CHN = (CHO2- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar22.0kcal/molPHPMSMeot-ner, 1988gas phase; M,B,M
Quantity Value Units Method Reference Comment
Deltar22.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Deltar21.4cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar15.6 ± 1.6kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy of 22.0 eu assumed.; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
11.8473.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(HCO2 anion bullet Hydrogen cyanide) + Hydrogen cyanide = (HCO2 anion bullet 2Hydrogen cyanide)

By formula: (CHO2- bullet CHN) + CHN = (CHO2- bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar17.8kcal/molPHPMSMeot-ner, 1988gas phase; M,B,M
Quantity Value Units Method Reference Comment
Deltar22.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Deltar23.6cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar10.70kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
9.6350.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(NH4+ bullet 3Hydrogen cyanide bullet Ammonia) + Hydrogen cyanide = (NH4+ bullet 4Hydrogen cyanide bullet Ammonia)

By formula: (H4N+ bullet 3CHN bullet H3N) + CHN = (H4N+ bullet 4CHN bullet H3N)

Quantity Value Units Method Reference Comment
Deltar8.6kcal/molPHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated, T = 392 in paper is error; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/ADeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated, T = 392 in paper is error; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
2.7292.PHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated, T = 392 in paper is error; M

(Chlorine anion bullet 8Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 9Hydrogen cyanide)

By formula: (Cl- bullet 8CHN) + CHN = (Cl- bullet 9CHN)

Quantity Value Units Method Reference Comment
Deltar7.5 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Deltar25.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar0.10kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
3.2171.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(MeCO2 anion bullet 4Hydrogen cyanide) + Hydrogen cyanide = (MeCO2 anion bullet 5Hydrogen cyanide)

By formula: (C2H3O2- bullet 4CHN) + CHN = (C2H3O2- bullet 5CHN)

Quantity Value Units Method Reference Comment
Deltar9.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Deltar25.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar2.40kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
4.5213.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(CN- bullet 6Hydrogen cyanide) + Hydrogen cyanide = (CN- bullet 7Hydrogen cyanide)

By formula: (CN- bullet 6CHN) + CHN = (CN- bullet 7CHN)

Quantity Value Units Method Reference Comment
Deltar7.6 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/AMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar1.60kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
3.0238.PHPMSMeot-ner, Cybulski, et al., 1988gas phase; Entropy change calculated or estimated; M

(CN- bullet 2Hydrogen cyanide) + Hydrogen cyanide = (CN- bullet 3Hydrogen cyanide)

By formula: (CN- bullet 2CHN) + CHN = (CN- bullet 3CHN)

Quantity Value Units Method Reference Comment
Deltar12.6kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar12.6kcal/molPHPMSMeot-ner, 1988gas phase; M,B,M
Quantity Value Units Method Reference Comment
Deltar21.2cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar21.2cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Deltar21.2cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar6.30kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- bullet 3Hydrogen cyanide) + Hydrogen cyanide = (CN- bullet 4Hydrogen cyanide)

By formula: (CN- bullet 3CHN) + CHN = (CN- bullet 4CHN)

Quantity Value Units Method Reference Comment
Deltar10.9kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar10.9kcal/molPHPMSMeot-ner, 1988gas phase; M,B,M
Quantity Value Units Method Reference Comment
Deltar24.8cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar24.8cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Deltar24.8cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar3.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- bullet Hydrogen cyanide) + Hydrogen cyanide = (CN- bullet 2Hydrogen cyanide)

By formula: (CN- bullet CHN) + CHN = (CN- bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar16.4kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar16.4kcal/molPHPMSMeot-ner, 1988gas phase; M,B,M
Quantity Value Units Method Reference Comment
Deltar21.8cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar21.8cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Deltar21.8cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar9.90kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

CH2N+ + Hydrogen cyanide = (CH2N+ bullet Hydrogen cyanide)

By formula: CH2N+ + CHN = (CH2N+ bullet CHN)

Quantity Value Units Method Reference Comment
Deltar26.1kcal/molPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; «DELTA»rH, «DELTA»rS too small compared with other nitrile dimers; M
Deltar30.0kcal/molPHPMSMeot-Ner (Mautner), 1978gas phase; M
Quantity Value Units Method Reference Comment
Deltar23.0cal/mol*KPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; «DELTA»rH, «DELTA»rS too small compared with other nitrile dimers; M
Deltar32.cal/mol*KPHPMSMeot-Ner (Mautner), 1978gas phase; M

(CN- bullet Water bullet 2Hydrogen cyanide) + Water = (CN- bullet 2Water bullet 2Hydrogen cyanide)

By formula: (CN- bullet H2O bullet 2CHN) + H2O = (CN- bullet 2H2O bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar8.9 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar2.9 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
3.7262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(CN- bullet 3Hydrogen cyanide) + Water = (CN- bullet Water bullet 3Hydrogen cyanide)

By formula: (CN- bullet 3CHN) + H2O = (CN- bullet H2O bullet 3CHN)

Quantity Value Units Method Reference Comment
Deltar9.4 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B,M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar3.4 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; Entropy estimated; B

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
4.2262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(CH2N+ bullet Hydrogen cyanide bullet Water) + Hydrogen cyanide = (CH2N+ bullet 2Hydrogen cyanide bullet Water)

By formula: (CH2N+ bullet CHN bullet H2O) + CHN = (CH2N+ bullet 2CHN bullet H2O)

Quantity Value Units Method Reference Comment
Deltar15.6kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar24.cal/mol*KN/AMeot-Ner (Mautner) and Speller, 1989gas phase; n, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar8.4kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n, Entropy change calculated or estimated; M

(NH4+ bullet Ammonia bullet 2Hydrogen cyanide) + Ammonia = (NH4+ bullet 2Ammonia bullet 2Hydrogen cyanide)

By formula: (H4N+ bullet H3N bullet 2CHN) + H3N = (H4N+ bullet 2H3N bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar12.9kcal/molPHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/ADeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
6.6315.PHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

(NH4+ bullet Hydrogen cyanide bullet 2Ammonia) + Hydrogen cyanide = (NH4+ bullet 2Hydrogen cyanide bullet 2Ammonia)

By formula: (H4N+ bullet CHN bullet 2H3N) + CHN = (H4N+ bullet 2CHN bullet 2H3N)

Quantity Value Units Method Reference Comment
Deltar11.2kcal/molPHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/ADeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
4.9315.PHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

(CN- bullet 4Hydrogen cyanide) + Hydrogen cyanide = (CN- bullet 5Hydrogen cyanide)

By formula: (CN- bullet 4CHN) + CHN = (CN- bullet 5CHN)

Quantity Value Units Method Reference Comment
Deltar9.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Deltar9.8kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar20.2cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Deltar20.2cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar3.80kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(NH4+ bullet Hydrogen cyanide) + Ammonia = (NH4+ bullet Ammonia bullet Hydrogen cyanide)

By formula: (H4N+ bullet CHN) + H3N = (H4N+ bullet H3N bullet CHN)

Quantity Value Units Method Reference Comment
Deltar18.8kcal/molPHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar22.cal/mol*KN/ADeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
9.4429.PHPMSDeakyne, Knuth, et al., 1994gas phase; Entropy change calculated or estimated; M

Bromine anion + Hydrogen cyanide = (Bromine anion bullet Hydrogen cyanide)

By formula: Br- + CHN = (Br- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar19.4 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Deltar16.0 ± 2.0kcal/molEstLarson and McMahon, 1984gas phase; Extrapolated from other halide data; B
Quantity Value Units Method Reference Comment
Deltar19.8cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar13.5 ± 1.6kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

C4H9O2+ + Hydrogen cyanide = (C4H9O2+ bullet Hydrogen cyanide)

By formula: C4H9O2+ + CHN = (C4H9O2+ bullet CHN)

Quantity Value Units Method Reference Comment
Deltar19.0kcal/molPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar23.cal/mol*KN/ASpeller and Meot-Ner (Mautner), 1985gas phase; Entropy change calculated or estimated; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
7.9455.PHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; Entropy change calculated or estimated; M

C3H7+ + Hydrogen cyanide = (C3H7+ bullet Hydrogen cyanide)

By formula: C3H7+ + CHN = (C3H7+ bullet CHN)

Quantity Value Units Method Reference Comment
Deltar39.6kcal/molPHPMSMeot-Ner (Mautner) and Sieck, 1991gas phase; condensation; M
Deltar30.8kcal/molPHPMSMeot-Ner (Mautner), 1978gas phase; forms i-C3H7NCH+; M
Quantity Value Units Method Reference Comment
Deltar45.2cal/mol*KPHPMSMeot-Ner (Mautner) and Sieck, 1991gas phase; condensation; M
Deltar32.cal/mol*KPHPMSMeot-Ner (Mautner), 1978gas phase; forms i-C3H7NCH+; M

HS- + Hydrogen cyanide = (HS- bullet Hydrogen cyanide)

By formula: HS- + CHN = (HS- bullet CHN)

Quantity Value Units Method Reference Comment
Deltar21.0 ± 1.0kcal/molIMREMeot-ner, 1988gas phase; See also H2S..CN-; B,M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KPHPMSMeot-ner, 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar15.0 ± 1.0kcal/molIMREMeot-ner, 1988gas phase; See also H2S..CN-; B

NH4+ + Hydrogen cyanide = (NH4+ bullet Hydrogen cyanide)

By formula: H4N+ + CHN = (H4N+ bullet CHN)

Quantity Value Units Method Reference Comment
Deltar21.9kcal/molPHPMSDeakyne, Knuth, et al., 1994gas phase; M
Deltar20.5kcal/molPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; M
Quantity Value Units Method Reference Comment
Deltar23.4cal/mol*KPHPMSDeakyne, Knuth, et al., 1994gas phase; M
Deltar20.2cal/mol*KPHPMSSpeller and Meot-Ner (Mautner), 1985gas phase; M

(CN- bullet Water bullet Hydrogen cyanide) + Water = (CN- bullet 2Water bullet Hydrogen cyanide)

By formula: (CN- bullet H2O bullet CHN) + H2O = (CN- bullet 2H2O bullet CHN)

Quantity Value Units Method Reference Comment
Deltar9.5 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar17.5cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar4.2 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

(CN- bullet 2Hydrogen cyanide) + Water = (CN- bullet Water bullet 2Hydrogen cyanide)

By formula: (CN- bullet 2CHN) + H2O = (CN- bullet H2O bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar7.7 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar12.5cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar4.0 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

(CN- bullet Hydrogen cyanide) + Water = (CN- bullet Water bullet Hydrogen cyanide)

By formula: (CN- bullet CHN) + H2O = (CN- bullet H2O bullet CHN)

Quantity Value Units Method Reference Comment
Deltar12.4 ± 1.0kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar19.7cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar6.5 ± 1.4kcal/molTDAsMeot-Ner (Mautner) M. and Speller, 1989gas phase; B

(Chlorine anion bullet 7Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 8Hydrogen cyanide)

By formula: (Cl- bullet 7CHN) + CHN = (Cl- bullet 8CHN)

Quantity Value Units Method Reference Comment
Deltar8.2 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar27.4cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar0.0 ± 2.2kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(CN- bullet Hydrogen cyanide bullet 2Water) + Hydrogen cyanide = (CN- bullet 2Hydrogen cyanide bullet 2Water)

By formula: (CN- bullet CHN bullet 2H2O) + CHN = (CN- bullet 2CHN bullet 2H2O)

Quantity Value Units Method Reference Comment
Deltar12.6kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
7.4262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(CN- bullet 2Hydrogen cyanide bullet Water) + Hydrogen cyanide = (CN- bullet 3Hydrogen cyanide bullet Water)

By formula: (CN- bullet 2CHN bullet H2O) + CHN = (CN- bullet 3CHN bullet H2O)

Quantity Value Units Method Reference Comment
Deltar12.3kcal/molPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KPHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

Free energy of reaction

DeltarG° (kcal/mol) T (K) Method Reference Comment
7.1262.PHPMSMeot-Ner (Mautner) and Speller, 1989gas phase; n; M

(Chlorine anion bullet 2Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 3Hydrogen cyanide)

By formula: (Cl- bullet 2CHN) + CHN = (Cl- bullet 3CHN)

Quantity Value Units Method Reference Comment
Deltar13.6 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar21.4cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar7.20kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Chlorine anion bullet 3Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 4Hydrogen cyanide)

By formula: (Cl- bullet 3CHN) + CHN = (Cl- bullet 4CHN)

Quantity Value Units Method Reference Comment
Deltar11.2 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar23.4cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar4.20kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Chlorine anion bullet Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 2Hydrogen cyanide)

By formula: (Cl- bullet CHN) + CHN = (Cl- bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar17.9 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar22.7cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar11.10kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 2Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 3Hydrogen cyanide)

By formula: (I- bullet 2CHN) + CHN = (I- bullet 3CHN)

Quantity Value Units Method Reference Comment
Deltar11.2 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar21.0cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar4.90kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Bromine anion bullet 2Hydrogen cyanide) + Hydrogen cyanide = (Bromine anion bullet 3Hydrogen cyanide)

By formula: (Br- bullet 2CHN) + CHN = (Br- bullet 3CHN)

Quantity Value Units Method Reference Comment
Deltar12.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar21.9cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar6.30kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Bromine anion bullet 3Hydrogen cyanide) + Hydrogen cyanide = (Bromine anion bullet 4Hydrogen cyanide)

By formula: (Br- bullet 3CHN) + CHN = (Br- bullet 4CHN)

Quantity Value Units Method Reference Comment
Deltar10.4 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar22.1cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar3.80kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Chlorine anion bullet 4Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 5Hydrogen cyanide)

By formula: (Cl- bullet 4CHN) + CHN = (Cl- bullet 5CHN)

Quantity Value Units Method Reference Comment
Deltar8.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar21.3cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar2.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Chlorine anion bullet 5Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 6Hydrogen cyanide)

By formula: (Cl- bullet 5CHN) + CHN = (Cl- bullet 6CHN)

Quantity Value Units Method Reference Comment
Deltar8.7 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar24.3cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar1.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Chlorine anion bullet 6Hydrogen cyanide) + Hydrogen cyanide = (Chlorine anion bullet 7Hydrogen cyanide)

By formula: (Cl- bullet 6CHN) + CHN = (Cl- bullet 7CHN)

Quantity Value Units Method Reference Comment
Deltar7.9 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar23.1cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar1.00kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 3Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 4Hydrogen cyanide)

By formula: (I- bullet 3CHN) + CHN = (I- bullet 4CHN)

Quantity Value Units Method Reference Comment
Deltar9.2 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar20.3cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar3.20kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 4Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 5Hydrogen cyanide)

By formula: (I- bullet 4CHN) + CHN = (I- bullet 5CHN)

Quantity Value Units Method Reference Comment
Deltar8.6 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar22.9cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar1.80kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 5Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 6Hydrogen cyanide)

By formula: (I- bullet 5CHN) + CHN = (I- bullet 6CHN)

Quantity Value Units Method Reference Comment
Deltar7.4 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar19.9cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar1.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 6Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 7Hydrogen cyanide)

By formula: (I- bullet 6CHN) + CHN = (I- bullet 7CHN)

Quantity Value Units Method Reference Comment
Deltar7.4 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar19.9cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar1.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet 7Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 8Hydrogen cyanide)

By formula: (I- bullet 7CHN) + CHN = (I- bullet 8CHN)

Quantity Value Units Method Reference Comment
Deltar6.8 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar21.2cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar0.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Iodide bullet Hydrogen cyanide) + Hydrogen cyanide = (Iodide bullet 2Hydrogen cyanide)

By formula: (I- bullet CHN) + CHN = (I- bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar13.2 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar20.0cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar7.20kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Bromine anion bullet 4Hydrogen cyanide) + Hydrogen cyanide = (Bromine anion bullet 5Hydrogen cyanide)

By formula: (Br- bullet 4CHN) + CHN = (Br- bullet 5CHN)

Quantity Value Units Method Reference Comment
Deltar8.1 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar18.5cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar2.60kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

(Bromine anion bullet Hydrogen cyanide) + Hydrogen cyanide = (Bromine anion bullet 2Hydrogen cyanide)

By formula: (Br- bullet CHN) + CHN = (Br- bullet 2CHN)

Quantity Value Units Method Reference Comment
Deltar16.3 ± 1.0kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar22.7cal/mol*KPHPMSMeot-ner, Cybulski, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar9.50kcal/molTDAsMeot-ner, Cybulski, et al., 1988gas phase; B

References

Go To: Top, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Larson and McMahon, 1987
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. The energetics of interaction between cyanide ion and bronsted acids, J. Am. Chem. Soc., 1987, 109, 6230. [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Gas phase bihalide and pseudohalide ions. An ICR determination of hydrogen bond energies in XHY- species (X,Y = F, Cl, Br, CN), Inorg. Chem., 1984, 23, 2029. [all data]

Meot-Ner (Mautner) and Speller, 1989
Meot-Ner (Mautner), M.; Speller, C.V., Multicomponent Cluster Ions.3. Comparative Stabilities of Cationic and Anionic Hydrogen Bonded Networks. Mixed Clusters of Water and Hydrogen Cyanide, J. Phys. Chem., 1989, 93, 6580. [all data]

Meot-ner, 1988
Meot-ner, M., Ionic Hydrogen Bond and Ion Solvation. 6. Interaction Energies of the Acetate Ion with Organic Molecules. Comparison of CH3COO- with Cl-, CN-, and SH-, J. Am. Chem. Soc., 1988, 110, 12, 3854, https://doi.org/10.1021/ja00220a022 . [all data]

Meot-ner, Cybulski, et al., 1988
Meot-ner, M.; Cybulski, S.M.; Scheiner, S.; Liebman, J.F., Is CN- Significantly Anisotropic? Comparison of CN- vs. Cl-: Clustering with HCN and Condensed Phase Thermochemistry, J. Phys. Chem., 1988, 92, 10, 2738, https://doi.org/10.1021/j100321a009 . [all data]

Payzant, Yamdagni, et al., 1971
Payzant, J.D.; Yamdagni, R.; Kebarle, P., Hydration of CN-, NO2-, NO3-, and HO- in the gas phase, Can. J. Chem., 1971, 49, 3308. [all data]

Larson and McMahon, 1983
Larson, J.W.; McMahon, T.B., Strong hydrogen bonding in gas-phase anions. An ion cyclotron resonance determination of fluoride binding energetics to bronsted acids from gas-phase fluoride exchange equilibria measurements, J. Am. Chem. Soc., 1983, 105, 2944. [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Arshadi, Yamdagni, et al., 1970
Arshadi, M.; Yamdagni, R.; Kebarle, P., Hydration of Halide Negative Ions in the Gas Phase. II. Comparison of Hydration Energies for the Alkali Positive and Halide Negative Ions, J. Phys. Chem., 1970, 74, 7, 1475, https://doi.org/10.1021/j100702a014 . [all data]

Woodin and Beauchamp, 1978
Woodin, R.L.; Beauchamp, J.L., Bonding of Li+ to Lewis Bases in the Gas Phase. Reversals in Methyl Substituent Effects for Different Reference Acids, J. Am. Chem. Soc., 1978, 100, 2, 501, https://doi.org/10.1021/ja00470a024 . [all data]

Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P., Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n, J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013 . [all data]

Staley and Beauchamp, 1975
Staley, R.H.; Beauchamp, J.L., Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases, J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050 . [all data]

Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria, J. Am. Chem. Soc., 1984, 106, 517. [all data]

Larson and McMahon, 1984, 3
Larson, J.W.; McMahon, T.B., Gas phase negative ion chemistry of alkylchloroformates, Can. J. Chem., 1984, 62, 675. [all data]

French, Ikuta, et al., 1982
French, M.A.; Ikuta, S.; Kebarle, P., Hydrogen bonding of O-H and C-H hydrogen donors to Cl-. Results from mass spectrometric measurement of the ion-molecule equilibria RH + Cl- = RHCl-, Can. J. Chem., 1982, 60, 1907. [all data]

Akin and Ervin, 2006
Akin, F.A.; Ervin, K.M., Collision-induced dissociation of HS-(HCN): Unsymmetrical hydrogen bonding in a proton-bound dimer anion, J. Phys. Chem. A, 2006, 110, 4, 1342-1349, https://doi.org/10.1021/jp0540454 . [all data]

Bradforth, Kim, et al., 1993
Bradforth, S.E.; Kim, E.H.; Arnold, D.W.; Neumark, D.M., Photoelectron Spectroscopy of CN-, NCO-, and NCS-, J. Chem. Phys., 1993, 98, 2, 800, https://doi.org/10.1063/1.464244 . [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Deakyne, Knuth, et al., 1994
Deakyne, C.A.; Knuth, D.M.; Speller, C.V.; Meot-Ner (Mautner), M.; Sieck, L.W., Filling of Solvent Shells about Ions. Part 3. Isomeric Clusters of (HCN)n(NH3)mH+, J. Mol. Structure (Theochem), 1994, 307, 217, https://doi.org/10.1016/0166-1280(94)80130-4 . [all data]

Speller and Meot-Ner (Mautner), 1985
Speller, C.V.; Meot-Ner (Mautner), M., The Ionic Hydrogen Bond and Ion Solvation. 3. Bonds Involving Cyanides. Correlations with Proton Affinites, J. Phys. Chem., 1985, 81, 24, 5217, https://doi.org/10.1021/j100270a020 . [all data]

Meot-Ner (Mautner), 1978
Meot-Ner (Mautner), M., Solvation of the Proton by HCN and CH3CN. Condensation of HCN with Ions in the Gas Phase., J. Am. Chem. Soc., 1978, 100, 15, 4694, https://doi.org/10.1021/ja00483a012 . [all data]

Meot-Ner (Mautner) M. and Speller, 1989
Meot-Ner (Mautner) M.; Speller, C.V., Multicomponent Cluster Ions. 2. Comparative Stabilities of Cationic and Anionic Hydrogen Bonded Networks. Mixed Clusters of Water and Hydrogen Cyanide, J. Phys. Chem., 1989, 93, 9, 3663, https://doi.org/10.1021/j100346a058 . [all data]

Meot-Ner (Mautner) and Sieck, 1991
Meot-Ner (Mautner), M.; Sieck, L.W., Proton affinity ladders from variable-temperature equilibrium measurements. 1. A reevaluation of the upper proton affinity range, J. Am. Chem. Soc., 1991, 113, 12, 4448, https://doi.org/10.1021/ja00012a012 . [all data]


Notes

Go To: Top, Reaction thermochemistry data, References